[jboss-jira] [JBoss JIRA] Commented: (JGRP-976) JGroups testsuite failures with link-local IPv6 addresses

[ https://jira.jboss.org/jira/browse/JGRP-976?page=com.atlassian.jira.plugi... ] Richard Achmatowicz commented on JGRP-976: ------------------------------------------ I have attached a small program BuggyServerSocketSender.java which reproduces ther error: When I run this program on Sun JDK 1.6.0_13, I can reproduce the error which is occurring in the JGroups testsuite (the Socket construction is the same as used by RouterStub). If I run the same program on OpenJDK 1.7, the error does not appear. By running the program with strace, which displays how the JDK calls the kernel (in particular, how the JDK makes calls to the socket function), you can see that in the Sun JDK case, an incorrect scope id is being used (lo). It is "incorrect", because I am passing a scoped link-local address to the socket call, which specifies the zone id of "%eth0". Here is the relevant section of the trace: [snip] [pid 3656] socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 4 [pid 3656] bind(4, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("eth0")}, 28) = 0 [pid 3656] getsockname(4, {sa_family=AF_INET6, sin6_port=htons(43780), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("eth0")}, [28]) = 0 [pid 3656] connect(4, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("lo")}, 28) = -1 EINVAL (Invalid argument) exception connecting to host: /fe80:0:0:0:215:58ff:fec8:81a8%eth0, port: 0java.net.SocketException: Invalid argument or cannot assign requested address java.net.SocketException: Invalid argument or cannot assign requested address at java.net.PlainSocketImpl.socketConnect(Native Method) Note that the sin6_scope is set to "lo", and not "eth0". This is the root cause of not being able to connect. But because I specified %eth0, this should get picked up by thye JDK. By running the same program with strace and OpenJDK, you can see that the correct zoneid is being picked up. Here is the same relevant section of the trace: [snip] [pid 2889] socket(PF_INET6, SOCK_STREAM, IPPROTO_IP) = 5 [pid 2889] bind(5, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("eth0")}, 28) = 0 [pid 2889] getsockname(5, {sa_family=AF_INET6, sin6_port=htons(47388), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("eth0")}, [28]) = 0 [pid 2889] connect(5, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6, "fe80::215:58ff:fec8:81a8", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=if_nametoindex("eth0")}, 28) = -1 ECONNREFUSED (Connection refused) exception connecting to host: /fe80:0:0:0:215:58ff:fec8:81a8%eth0, port: 0java.net.ConnectException: Connection refused java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) Note that here we have a connection refused (which should be the case, as I don't have a server running). So, on Sun JDK 1.6.0_13 with link-local addresses, we have a problem it seems. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira